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yes it can and its almost too easy. Simply add the new node to the management group and then add it to the cluster and then it will probably ask you if you want to convert your LUNs to NR10, but if it doesn't then you simply right click on each LUN and select edit and then change the raid level to NR10 there and it will do an online restripe. The only think you MIGHT need to change is if you haven't setup your iSCSI sessions correctly on your servers for MPIO then you will need to do that now, but if you have then there is nothing that needs to be done on the servers and any new connections will be automatically created.